Crushing rolls



F. .s. STRAUB CRUSHING ROLLS Sept. 16 1924'.

Filed Feb. '7, 1922 INVENTOR.

Patented Sept. 16, 1924.

UNITED FRANCIS J. STRAUB, NEW KENSINGTON, PENNSY LVANIA.

CRUSHING ROLLS.

Application filed February 7, 1922. Serial No. 534,705. 1

To all whom it may camera:

Be it lmown that I, FRANCIS J. STRAUB, a citizen of the United States, residin at New Kensington, in the county of estmoreland and State of Pennsylvania, have invented certain new and useful Improve ments in Crushing Rolls, of which the following is a specification.

y invention consists of an improvement in crusher-s for reducing any material, as cinders, to a desired size for use in the arts.

The machine is particularly designed for reducing cinders and ashes containing clinkers or large pieces to a desired maximum, as say small enough" to pass through a onehalf inch screen carrying with it the smaller particles, for use in making cinder blocks like those of my prior Patent No.

1,212,840 of January 16, 1917.

In using a pair of rolls alone, the raw material of the kind used is merely "subjected to the crushing action of the rolls without suflicient rubbing to effect complete abra sion and reduction to the desired degree. The present improvement provides supplemental non-rotatable faces located in relation to the rollfaces and with sufficient desired clearance, so that the material after passing through the rolls will be subjected to further additional abrasive action in order to reduce it to the desired consistency.

The invention provides relatively stationary converging faces, between the faces of the two crushing rolls, whereby to utilize the positive feeding action thereof and the efi'ective opposition to the diverging roll faces at each side beyond the bite of the rolls, as hereinafter described. The invention also provides means for mounting the resisting member; means whereb it may be adjusted for wear; means for resiliently and adjustably mounting it; and various other features as hereinafter set forth.

Referring to the drawings, showing one preferred form of the invention,

Fig. 1 is a central longitudinal sectional view of the machine on the line I-I of Fig. 2;

Fig. 2 is a cross section on the line 11-11 of Fig. 1;

Fig. 3 is a plan view of the intervening opposing member and its support;

ig. 4 is a plan view of the adjusting cam mechanism;

Fig. 5 is a detail view showing the cam adjusting mechanism in raised position.

In the drawings, AB are the rolls, each mounted on its carrying and driving shaft 2 and 3 respectively, journalled in pillow blocks 4., both of which shafts with their rolls are driven in theusual way, as indi cated by the arrows, by pulleys 5 or other suitable gearing. The rolls are mounted on foundation timbers 6 or other suitable supporting base, and are provided with a superimposed feeding hopper C for the raw material and any suitable. receiving floor sisting of a wedge-shaped block having concave faces 8 conforming generally to the contour of each roll, and spaced therefrom more or less with relation to the size o-f the product and generally conforming to the curvature of the rolls. Faces 8 may be smooth or corrugated, as desired, and operate to provide relatively stationary opposing surfaces, against which the crushed product will be pressed as it is carried downwardly at each side by the rolls, finally passing outwardly as indicated by the arrows in the form of the finished product or crushed raw material, ready for use in flip manufacture of building blocksor the The wedge member 7 is preferably composed of a series of sections 7, 7", 7 and 7 of any suitable number, each of which interfits with its adjacent member by a projecting tongue 9 and groove 9 at opposite sides of the sections, as clearly shown in Fig. 3. By such construction, when the middle sections become 'worn, as they are apt to do, they may be alternated with the outer sections so as to provide for equal wear throughout the several sections during continuous operation of the machine. The sections comprising the wedge member are rigidly mounted upon a longitudinal supporting bar 10, of channel or other suitable shape, to which the sections are rigidly secured by bolts 11, the middle portween bars 10 and l lis a relatively movable similar bar 15, and between bars 14 and 15 are the intervening wedging or cam shoe members 16 and 17, in pairs, at each end, in the form of cylindrical cams surrounding the bolts 13. The lower cam member 17 acts by wedge faces 18 to elevate the cooperating shoes 16 and also bar 15 when the members 17 are thrust around by their lever arms 19 and connecting bar 20 operated by lever 21, as clearly indicated 1n Figs. 1, 4i and 5.

ween bar 10 and bar 15 are interposedsprings 22 surrounding bolts 13, bearing by t eir opposite ends against said bars. These springs are so adjusted as to strength and resiliency to provide ample cushionmg resistance to the wedge member 7 to permit it to recede downwardly to a degree under operation of the rolls and the material being acted upon, so as to provide for a slight compensating movement in connectlon with any variations in consistency of the raw material and tending to prevent any breaking strains or undue pressure. The construction also prevents choking of the material in its passage through the machine.

By means of the cam mechanism, upward pressure may be exerted against springs 22 to raise the wedge member 17, more or less depending upon the: conditions present, while also providing for the lowering of the wedge member suficiently far to increase the space intervening between the rolls and opposing curved faces 8 to any desired deree. The conditions and extent of such adustment are entirely within the province of the designing engineer or builder, and may be varied to suit conditions of use.

The construction and operation of the invention will be readily understood and appreciated from the foregoing description. In the use of a single crushing roll, acting against a relatively stationary opposing face, there is a usual tendency to chokm of the machine and slippage of the roll against the material, without efiecting any continuous grinding. In my present machine, be-

cause of the gripping action of the two rolls, there is a positive downward feed of the raw material and a positive forcing of it against the curved faces 8 at each side of the wedge member beyond the bite of the rolls. ll thereby ensure continuous efiective operation, while the various adjustments provided for ensure the quality of the resulting product as to consistency, size, etc. within any desirable or necessary limits. I

lit will be understood that the invention may be variously changed or modified in de- P tail construction, or otherwise by the skilled mechanic, but all such changes are to be considered as within the scope of the following claims.

What ll claim is:

1. lln'a crusher of the class described, the combination with a pair of spaced crushing rolls and a frame therefor, of an intervening wedge shaped resisting member composed of a series of interlocking sections having concave tapering faces conforming to the curvature of the rolls, a longitudinal supporting bar therefor, bolts connecting each section with the bar, stems suspended from the frame forming guides for the supporting bar, alower supporting frame suspended below the bar, intervening cushioning springs engaging the ends of the bar and resiliently supporting the several sections, and means for varying the tension of the springs.

2. In a crusher of the class described, the

combination with a pair of spaced crushing rolls and a frame therefor, of an intervening Wedge shaped resisting member composed of a series of interlocking sections having concave tapering faces conforming to the curvature of the rolls, a longitudinal supporting bar therefor bolts connecting each section with the bar, a lower supporting frame suspended below the bar, intervening cushioning springs engaging the ends of the bar and resiliently supporting the several sect1ons, a pair of bearlng cams, avpair of coasting cams, a lowermost bar, supporting guide stems depending from the frame extending through the section supporting bar, springs, supporting frame, cams, and the lower supporting frame and carrying said frame .and lever mechanism for actuating one of said pair of cams against the other to vary the tension of the spring.

In testimony whereof ll hereunto afix my signature.

FRANCIS J. STRAUB.

llllO 

